[07] WHY CAN'T I USE FTP TO TRANSFER MY FILES?

  Inbound FTP connections (via FTP, scp or sftp) are available to 
  validated members and above.  For more information about validation
  please type 'validate' at the shell.

  A slower, but still acceptable method of sending/receiving files
  from SDF can be found with the XYZMODEM tools.  Infact, SDF used
  XYZMODEM for file transfers before we installed FTP.  If you don't
  know about XYZMODEM, these are a protocol set for transfering files
  over a dialup modem connection.  Some TELNET programs such as 
  TERATERM support these protocols.

  Examples
  --------

  Uploading a file to SDF:

  1. Tell SDF you want to send a file:

  $ rz  (or 'upload')

  2. Start the file transfer from your TERMINAL.

  Downloading a file from SDF:

  1. Tell SDF which files you want to download:

  $ sz filename

  Usually (with ZMODEM) your TERMINAL will automatically respond by 
  initiating a file transfer session.

  We recommend using ZMODEM as it seems to be the fastest and most
  reliable method.  You can use "sb/rb - YMODEM or sx/rb - XMODEM"
  if ZMODEM doesn't seem to work for you.

  Finally, you can also use the C port of Columbia's KERMIT protocol.
  This program was original developed to transfer files between the
  DECSystem-10 and the IBM PCs that students and faculty were using 
  as terminals.

  C KERMIT actually has a C implementation of CMND-JSYS, the command
  parser which implementions command completion and recognition that
  made TOPS-10 and TOPS-20 so popular.  Also, there is support for
  ZMODEM/XMODEM/YMODEM in KERMIT.  Use 'set proto zmodem' to turn it
  on.
  
